Hi ​@MH35, welcome to the Sonos Community!

The creation and editing of Sonos playlists isn’t available in current Sonos app. This feature will return in a future update, but I don’t have an ETA to share on when this will be. For now, if you want to edit or create new playlists, please use the Sonos Desktop controller to do this.

I hope this information helps.

I now construct and edit all my playlists in Amazon Music, as that is whee all my playlist tracks come from.

I realise this won't be the best option for everyone.

I changed also to Amazon with my playlistmanagement,
till sonos has killt the functionality with the new app.

so I am also save against failure on sonos side.

But thats only a workaround for working with a smart system like sonos

Dom